<template>
  <div>
    新闻管理
    <div class="data">
      <div class="searchForm">
        <el-form :inline="true" :model="params" class="demo-form-inline">
          <el-form-item label="标题">
            <el-input
               v-model="params.title"
               placeholder="按标题查找"
               class="block">
            </el-input>
          </el-form-item>
          <el-form-item>
            <el-button
               icon="el-icon-search"
               @click="getList(1)"
               class="block">
               查询</el-button>

               <el-button
               type="primary"
               icon="el-icon-plus"
               @click="add"
               >增加</el-button>

              <el-button
               type="danger"
               icon="el-icon-delete"
               @click="removeMore"
               >批量删除</el-button>
          </el-form-item>
        </el-form>
      </div>
    </div>
    <div class="message">
      <div class="message1">
         <el-table :data="rows" stripe style="width: 100%" @selection-change="handleSelectionChange">
           <el-table-column type="selection" width="55"></el-table-column>
           <el-table-column prop="img" label="图片">
             <template slot-scope="scope">
              <img style="width:50px;height:50px;" v-if="scope.row.img" :src="scope.row.img"/>
             </template>
           </el-table-column>
           <el-table-column prop="title" label="标题" min-width="200px">
           </el-table-column>
           <el-table-column prop="digest" label="摘要" min-width="300px">
           </el-table-column>
           <el-table-column prop="userId" label="作者">
           </el-table-column>
           <el-table-column prop="hot" label="热门">
           </el-table-column>
           <el-table-column prop="status" label="是否启用">
             <template slot-scope="scope">
                <el-switch
                  v-model="scope.row.status"
                  active-color="#13ce66"
                  inactive-color="#ff4949"
                  @change="statusChange(scope.row)"
                  :active-value="1"
                  :inactive-value="0">
                </el-switch>
             </template>
           </el-table-column>
           <el-table-column width="320" label="操作">
             <template slot-scope="scope">
               <el-button
               type="primary"
               size="mini"
               icon="el-icon-edit"
               style="margin-right:16px;"
               @click="edit(scope.row)"
               >编辑</el-button>
               <el-popconfirm
                 title="确定删除此数据吗？"
                 @confirm="remove(scope.row)"
               >
                 <el-button 
                 type="danger"
                 size="mini"
                 icon="el-icon-delete"
                 slot="reference">删除</el-button>
               </el-popconfirm>
             </template>
           <template>
             <el-button
               type="primary"
               size="mini"
               icon="el-icon-edit"
               >编辑</el-button>
               <el-button
               type="danger"
               size="mini"
               icon="el-icon-refresh-right"
               >删除</el-button>
           </template>
           </el-table-column>
         </el-table>
      </div>
    </div>
    <div class="pagination">
        <el-pagination
           @size-change="sizeChange"
           @current-change="getList"
           :current-page="params.pageNum"
           :page-sizes="[5,10, 100, 200, 300, 400]"
           :page-size="params.pageSize"
           layout="total, sizes, prev, pager, next, jumper"
           :total="total">
        </el-pagination>
    </div>
    <el-dialog :title="form._id ? '修改' : '新增'" :visible.sync="dialogFormVisible" width="400px">
        <el-form :model="form" ref="form" :rules="rules" label-width="100px">
            <el-form-item label="图片" prop="img">
              <div @click="openFile" class="imgStyle">
                <img style="max-width:100%;max-height:100%" v-if="form.img" :src="form.img" />
                <span v-else>+</span>
              </div>
              <input ref="file" style="display:none" multiple type="file" accept="image/*" @change="changeFile" />
            </el-form-item>
            <el-form-item label="标题" prop="title">
                <el-input type="text" v-model="form.title"></el-input>
            </el-form-item>
            <el-form-item label="摘要" prop="digest">
                <el-input type="text" v-model="form.digest"></el-input>
            </el-form-item>
            <el-form-item label="作者" prop="userId">
                <el-input type="text" v-model="form.userId"></el-input>
            </el-form-item>
            <el-form-item label="类型" prop="type">
              <el-select v-model="form.type" placeholder="请选择">
                 <el-option
                 v-for="type in types"
                 :key="type.value"
                 :label="type.label"
                 :value="type.value">
                 </el-option>
              </el-select>
            </el-form-item>
        </el-form>
        <div slot="footer" class="dialog-footer">
            <el-button @click="dialogFormVisible = false">取消</el-button>
            <el-button @click="submit" type="primary">确定</el-button>
        </div>
    </el-dialog>
  </div>
</template>

<script>
import api from "@/api";
export default {
  name: 'xinwenXinwen',
  components: {

  },
  data(){
    return {
      //查询参数
      params:{
          title:'',
          type:'news',
          pageNum:1,
          pageSize:5
      },
      rows:[],
      total:0,
      dialogFormVisible:false,
      form:{ 
        _id:0,
        title:'',
        type:'news',
        img:'',
        digest:'',//摘要
        hot:0,
        time1:'',
        userId:''
      },
      rules:{
        title:[
          { required: true, message: '标题不能为空', trigger: 'blur' }
        ]
      },
      types:[
        {label:'新闻管理',value:'news'},
      ],
      selecteds:[]
    }
  },
  methods:{
    //获取列表
    getList(pageNum){
      if(pageNum) this.params.pageNum = pageNum
      this.$http({
        url:'/admin/index/news',
        params:this.params
      }).then(res => {
       this.total = res.total
       this.rows = res.rows
     })
    },
    ///启用停用
    statusChange(row){
       this.$http({
           url:'/admin/index',
           method:'PUT',
           data:{
             indexId:row._id,
             status:row.status
           }
          }).then(res => {
            if(res.errorMsg){
              this.getList()
            }
          })
    },
    //修改pageSize
    sizeChange(pageSize){
      this.params.pageSize = pageSize
      this.getList(1)
    },
    add(){
      //初始化
      this.form = {
        _id:0,
        title:'',
        type:'news',
        img:'',
        digest:'',
        time:'',
        userId:''
      }
      this.dialogFormVisible = true
    },
    edit(row){
      this.form = row
      this.dialogFormVisible = true
    },
    //删除数据
    remove(row){
      this.$http({
        url:'/admin/index/news',
        method:'DELETE',
        params:{indexId:row._id}
      }).then(res => {
        if(!res.errorMsg){
          this.getList(1)
        }
      })
    },
    handleSelectionChange(rows){
      //存储选中数据
      this.selecteds = rows
    },
    //批量删除
    removeMore(){
      //获取备选中数据
      let checkedRowsPromise = []
      let success = [],fail = []
      for(let i = 0; i< this.selecteds.length; i ++){
       checkedRowsPromise.push(
          new Promise(resovle => {
            let row = this.selecteds[i]
            this.$http({
              url:'/admin/index/news',
              method:'DELETE',
              params:{indexId:row._id}
            }).then(res => {
              if(!res.errorMsg){
              success.push(row._id)
             }else{
               fail.push(row._id)
             }
             resovle()
            })
          })
        )
      }
      this.$confirm('此操作将删除选中的数据, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).then(() => {
          //删除
      Promise.all(checkedRowsPromise).then(() =>{
        this.$message({
          message: `批量删除完成，成功删除${success.length}条数据,删除失败${fail.length}条数据`,
          duration:3000
        });
          this.getList(1)
      })
      })
    },
     openFile(){
      let fileElement = this.$refs.file
      fileElement.click()
    },
      changeFile(e){
      let files = e.target.files
      let formData = new FormData()
      formData.append('file',files[0])
      this.$http({
        url:'/upload',
        method:'POST',
        data:formData
      }).then(res => {
      var path = res.path.split('\\')
      path = path[0]+'/'+path[1]
        if(res.path) this.form.img = api.baseURL + '/' + path
      })
    },
    submit(){
      this.$refs.form.validate(valid => {
        if(valid){
          this.form.indexId = this.form._id
          this.$http({
           url:'/admin/index/news',
           method:this.form.indexId ? 'PUT' :'POST',//通过indexId判断新增还是修改
           data:this.form
          }).then(res => {
            if(!res.errorMsg){
              this.dialogFormVisible = false
              this.getList(this.form.indexId ? undefined : 1)
            }
          })
        }
      })
    }
  },
  created(){
    this.getList()
  },
  mounted(){

  }
}
</script>

<style>
.data{
  margin-top: 8%;
  width: 90%;
  margin-left: 3%;
  background-color: white;
}
.message{
  margin-top: 2%;
  margin-left: 3%;
  width: 90%;
}
.pagination{
  margin-top: 2%;
  margin-left: 3%;
}
.imgStyle {
  width: 100px;
  height: 100px;
  font-size: 32px;
  border: 1px solid #ccc;
  text-align: center;
  line-height: 100px;
  overflow: hidden;
}
</style>